| Bill Wendling | a08bb49 | 2013-08-22 00:51:19 +0000 | [diff] [blame] | 1 | ; RUN: opt < %s -analyze -scalar-evolution | FileCheck %s |
| 2 | |
| 3 | ; CHECK: backedge-taken count is 255 |
| Nick Lewycky | f545749 | 2008-12-09 07:25:04 +0000 | [diff] [blame] | 4 | |
| 5 | define i32 @foo(i32 %x, i32 %y, i32* %lam, i32* %alp) nounwind { |
| 6 | bb1.thread: |
| 7 | br label %bb1 |
| 8 | |
| 9 | bb1: ; preds = %bb1, %bb1.thread |
| 10 | %indvar = phi i32 [ 0, %bb1.thread ], [ %indvar.next, %bb1 ] ; <i32> [#uses=4] |
| 11 | %i.0.reg2mem.0 = sub i32 255, %indvar ; <i32> [#uses=2] |
| David Blaikie | 79e6c74 | 2015-02-27 19:29:02 +0000 | [diff] [blame] | 12 | %0 = getelementptr i32, i32* %alp, i32 %i.0.reg2mem.0 ; <i32*> [#uses=1] |
| David Blaikie | a79ac14 | 2015-02-27 21:17:42 +0000 | [diff] [blame] | 13 | %1 = load i32, i32* %0, align 4 ; <i32> [#uses=1] |
| David Blaikie | 79e6c74 | 2015-02-27 19:29:02 +0000 | [diff] [blame] | 14 | %2 = getelementptr i32, i32* %lam, i32 %i.0.reg2mem.0 ; <i32*> [#uses=1] |
| Nick Lewycky | f545749 | 2008-12-09 07:25:04 +0000 | [diff] [blame] | 15 | store i32 %1, i32* %2, align 4 |
| 16 | %3 = sub i32 254, %indvar ; <i32> [#uses=1] |
| 17 | %4 = icmp slt i32 %3, 0 ; <i1> [#uses=1] |
| 18 | %indvar.next = add i32 %indvar, 1 ; <i32> [#uses=1] |
| 19 | br i1 %4, label %bb2, label %bb1 |
| 20 | |
| 21 | bb2: ; preds = %bb1 |
| 22 | %tmp10 = mul i32 %indvar, %x ; <i32> [#uses=1] |
| 23 | %z.0.reg2mem.0 = add i32 %tmp10, %y ; <i32> [#uses=1] |
| 24 | %5 = add i32 %z.0.reg2mem.0, %x ; <i32> [#uses=1] |
| 25 | ret i32 %5 |
| 26 | } |